fix(@uppy/image-editor): destroy cropper and clean up state on file re-open and removal

When opening the image editor for a second file (e.g. drag file → save in
editor → clear → drag new file), the old Cropper instance was not destroyed.
This caused `initCropper()` to bail early (`if (this.cropper) return`),
leaving the new image with a stale cropper that retained the previous file's
crop dimensions and referenced a destroyed DOM element.

Additionally, when a file was removed from the Dashboard, the ImageEditor
plugin had no handler to clean up its internal state (currentImage, cropper,
objectUrl), so everything persisted into the next editing session.

Changes:
- Call `this.destroyCropper()` at the top of `start()` to tear down any
  previous cropper before initializing a new editing session
- Add a `file-removed` event listener (registered in `install()`, cleaned
  up in `uninstall()`) that calls `stop()` when the currently-edited file
  is removed from Uppy

.changeset/fix-image-editor-cleanup.md

@@ -0,0 +1,5 @@
+---
+"@uppy/image-editor": patch
+---
+
+Fix cropper not reinitializing after save/cancel by destroying previous instance in `start()` and cleaning up on file removal

packages/@uppy/image-editor/src/ImageEditor.tsx

@@ -350,6 +350,7 @@ export default class ImageEditor<
    */
   start = (file: UppyFile<M, B>): void => {
     // Clean up any previous editing session
+    this.destroyCropper()
     if (this.objectUrl) {
       URL.revokeObjectURL(this.objectUrl)
       this.objectUrl = null
@@ -480,8 +481,16 @@ export default class ImageEditor<
     return this.objectUrl
   }
 
+  handleFileRemoved = (file: UppyFile<M, B>): void => {
+    const { currentImage } = this.getPluginState()
+    if (currentImage && currentImage.id === file.id) {
+      this.stop()
+    }
+  }
+
   install(): void {
     this.resetEditorState(null)
+    this.uppy.on('file-removed', this.handleFileRemoved)
 
     const { target } = this.opts
     if (target) {
@@ -496,6 +505,7 @@ export default class ImageEditor<
       const file = this.uppy.getFile(currentImage.id)
       this.uppy.emit('file-editor:cancel', file)
     }
+    this.uppy.off('file-removed', this.handleFileRemoved)
     this.stop()
     this.unmount()
   }